Bernoulli's eyes would pop out if he saw these!

Eyepops are a fun, simple way to explore how air pressure changes with velocity. Blow into the mouthpiece, and the eyes float on a stream of air! Daniel Bernoulli explained in the 18th century that the pressure decreases as the speed of a moving fluid increases.

The higher atmospheric pressure surrounding the stream of air keeps the eyes floating in the stream. Explanation and other Bernoulli experiments included.

Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.